The Scattered Disk Population and the Oort Cloud
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The trans-Neptunian belt has been subject to a strong depletion that has reduced its primordial population by a factor of one hundred over the solar system's age. One by-product of such a depletion process is the existence of a scattered disk population in transit from the belt to other places, such as the Jupiter zone, the Oort cloud or interstellar space. We have integrated the orbits of the scattered disk objects (SDOs) so far discovered by 2500 Myr to study their dynamical time scales and the probability of falling in each of the end states mentioned above, paying special attention to their contribution to the Oort cloud. We found that their dynamical half-time is close to 2.5 Gyr and that about one third of the SDOs end up in the Oort cloud.
KeywordsSolar System Dynamical Time Oort Cloud Interstellar Space Strong Depletion
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- Duncan, M. J. and Levison, H. F.: 1997, ‘A Disk of Scattered Icy Objects and the Origin of Jupiterfamily Comets’ Science 276, 1670–1672.Google Scholar
- Duncan, M., Quinn, T., and Tremaine, S.: 1988, ‘The Prigin of Short-period Comets’ Astrophys. J. Lett. 328, L69–L73.Google Scholar
- Fernández, J. A.: 1980, ‘On the Existence of a Comet Belt Beyond Neptune’ Mon. Not. R. Astr. Soc. 192, 481–491.Google Scholar
- Fernández, J. A., Gallardo, T., and Brunini, A.: 2002, ‘Are There Many Inactive Jupiter Family Comets Among the Near-Earth Asteroid Population?’ Icarus 159, 358–368.Google Scholar
- Kowal, C.: 1989, ‘A Solar System Survey’ Icarus 77, 118–123.Google Scholar
- Larsen, J. A., Gleason, A. E., Danzi, N.M., Descour, A. S., McMillan, R. S., Gehrels, T., Jedicke, R., Montani, J. L., and Scotti, J. V.: 2001, ‘The Spacewatch Wide-area Survey for Bright Centaurs and Trans-Neptunian Objects’ Astron. J. 121, 562–579.Google Scholar
- Luu, J., Marsden, B. G., Jewitt, D., Trujillo, C. A., Hergenrother, C. W., Chen, J., and Offutt, W. B.: 1997, ‘A New Dynamical Class of Object in the Outer Solar System’ Nature 387, 573–575.Google Scholar
- Trujillo, C. A., Jewitt, D. C., and Luu, J. X.: 2001, ‘Properties of the Trans-Neptunian Belt: Statistics from the Canada-France-Hawaii Telescope Survey’ Astron. J. 122, 457–473.Google Scholar